It's really easy to get caught up in not doing something earlier in ones life, but it's never too late to get started on a task if you're passionate about it. Work smart and hard, but give yourself time to breathe, you don't want to burn out. In just a few years time you'll see improvements you may have never thought possible. It's not a race, and as others have said you're still quite young, I'm only a few years older than you but it's taken me a decade to get where I am and I still have a long way to go as well.
Treat art as a life long pursuit and keep your mind focused forward, it's a long game so try and have some fun while you play. 